A Study of SHR-A1811 Monotherapy or Combined With Pyrotinib Maleate as Neoadjuvant Treatment in HER2-positive Breast Cancer Patients

Summary

This is a phase II trial evaluating the efficacy and safety of SHR-A1811 monotherapy or combined with pyrotinib maleate in Stage II-III HER2-positive breast cancer. Subjects will receive the neoadjuvant therapy of SHR-A1811 monotherapy or combined with pyrotinib for six cycles, and then undergo surgery within 4 weeks after neoadjuvant therapy. Efficacy will be assessed every 2 cycles.

Eligibility

Inclusion Criteria:

* Female patients aged ≥ 18 but ≤ 75 years
* Histologically confirmed to be HER2-positive invasive breast cancer
* Treatment-naive patients with stage II-III
* Eastern Cooperative Oncology Group (ECOG) score 0-1
* Good level of organ function

Exclusion Criteria:

* Previously received any anti-tumor therapy (chemotherapy, radiotherapy, molecular targeted therapy, endocrine therapy, etc.)
* Received any other anti-tumor therapy at the same time
* Bilateral breast cancer, inflammatory breast cancer or occult breast cancer
* Stage IV breast cancer
* With a history of any malignancies in the past 5 years, excluding cured cervical carcinoma in situ and melanoma skin cancer
* Inability to swallow, chronic diarrhea, intestinal obstruction, and a variety of factors affecting drug administration and absorption
* Participated in other drug clinical trials within 4 weeks before enrollment
* History of allergies to the drug components of this protocol
* Clinically significant pulmonary diseases
* Clinically significant cardiovascular diseases
* History of immunodeficiency
* Active hepatitis and liver cirrhosis

Conditions3

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